General Chemistry
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77 If all bullets could not be removed from gun shot injury of a man, it may cause poisoning by which of the following:
A
Mercury
B
Lead
C
Iron
D
Arsenic
78 The chemical(s) most commonly used for cloud seeding or ‘artificial rainmaking’ is/are
A
Silver Iodide
B
Sodium Chloride
C
Dry ice or frozen carbon dioxide
D
All the above
80 An emulsion is a colloid of a
A
gas in a liquid
B
liquid in a liquid
C
liquid in a gas
D
gas in a solid
84 Dry powder fire extinguishers contain :
A
sand
B
sand and sodium carbonate
C
sand and potassium carbonate
D
sand and sodium bicarbonate